Against 399 other V6 cars rated 2018–2020, the SLC-Class beats their 21.7 mpg average by 3.3 mpg, about $234 a year. Averaged over the years each was sold, the most economical engine since 2017, the 2L 4-cyl (2017–2020), does 27 mpg and the thirstiest, the 3L 6-cyl (2017–2020), 23: $248 a year apart.
Every Mercedes-Benz SLC-Class engine, compared
Yearly cost assumes 12,000 miles at $3.20 a gallon.
| Engine | Combined | City / Highway | Years | Fuel per year |
|---|---|---|---|---|
| 2L 4-cyl | 24 / 32 | 2017–2020 | $1,422 | |
| 3L 6-cyl | 20 / 29 | 2017–2020 | $1,670 |
What that actually costs
| Measure | Value |
|---|---|
| Cost per mile (2020) | $0.128 |
| Fuel per year | $1,536 |
| Fuel over five years | $7,680 |
| Against other V6 cars, 2018–2020 | −$234 a year |
| EPA's own estimate | $3,100 a year |
City or highway — who is this car for
The 2020 Mercedes-Benz SLC-Class gives up 9 mpg in town: 30.5 on the highway against 21.5 in the city, $527 a year if every mile were city driving.
| Measure | Value | Reading |
|---|---|---|
| City (2020) | 21.5 mpg | $1,786 a year if you only drive in town |
| Highway | 30.5 mpg | $1,259 a year if you mostly commute |
| Gap | +9 mpg (42%) | Wide — this car dislikes traffic |
How the SLC-Class changed over the years
Combined figure across the 4 model years the SLC-Class was rated in, all of them at 25 mpg.
| Model year | Combined | City / Highway | Engines offered | Fuel per year |
|---|---|---|---|---|
| 2020 | 21.5 / 30.5 | 2 | $1,536 | |
| 2019 | 21.5 / 30.5 | 2 | $1,536 | |
| 2018 | 22.5 / 30.5 | 2 | $1,536 | |
| 2017 | 22.5 / 30.5 | 2 | $1,536 |
MPG is a number. Dollars per year is the answer.
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How we count
This page rests on 8 EPA ratings of the Mercedes-Benz SLC-Class — 2 engines across 2017–2020. The mileage is EPA's laboratory figure, unchanged; the yearly bill is ours, at 12,000 miles and $3.20 a gallon, against EPA's own estimate of $3,100. Full method.
Frequently asked questions
What mpg does the 2020 Mercedes-Benz SLC-Class get?
25 mpg combined, 21.5 city and 30.5 highway, per EPA; its 2 versions that year range from 23 to 27. Across every year since 2017 the SLC-Class has averaged 25 mpg.
Is the 2020 SLC-Class more efficient than the 2019?
About the same: 25 against 25 mpg combined.
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